Sn 1998A: explosion of a blue supergiant
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Pastorello, A; Baron, E; Branch, David; Zampieri, L; Turatto, Massimo; Ramina, M; Benetti, Stefano; Cappellaro, Enrico; Salvo, Maria; Patat, Ferdinando; Piemonte, A; Sollerman, Jesper; Leibundgut, Bruno; Altavilla, G
Description
We present spectroscopic and photometric observations of the peculiar Type II supernova (SN) 1998A. The light curves and spectra closely resemble those of SN 1987A, suggesting that the SN 1998A progenitor exploded when it was a compact blue supergiant. However, the comparison with SN 1987A also highlights some important differences: SN 1998A is more luminous and the spectra show bluer continua and larger expansion velocities at all epochs. These observational properties indicate that the...[Show more]
dc.contributor.author | Pastorello, A | |
---|---|---|
dc.contributor.author | Baron, E | |
dc.contributor.author | Branch, David | |
dc.contributor.author | Zampieri, L | |
dc.contributor.author | Turatto, Massimo | |
dc.contributor.author | Ramina, M | |
dc.contributor.author | Benetti, Stefano | |
dc.contributor.author | Cappellaro, Enrico | |
dc.contributor.author | Salvo, Maria | |
dc.contributor.author | Patat, Ferdinando | |
dc.contributor.author | Piemonte, A | |
dc.contributor.author | Sollerman, Jesper | |
dc.contributor.author | Leibundgut, Bruno | |
dc.contributor.author | Altavilla, G | |
dc.date.accessioned | 2015-12-13T22:52:07Z | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/1885/81408 | |
dc.description.abstract | We present spectroscopic and photometric observations of the peculiar Type II supernova (SN) 1998A. The light curves and spectra closely resemble those of SN 1987A, suggesting that the SN 1998A progenitor exploded when it was a compact blue supergiant. However, the comparison with SN 1987A also highlights some important differences: SN 1998A is more luminous and the spectra show bluer continua and larger expansion velocities at all epochs. These observational properties indicate that the explosion of SN 1998A is more energetic than SN 1987A and more typical of Type II supernovae. Comparing the observational data with simulations, we deduce that the progenitor of SN 1998A was a massive star (∼25 M⊙) with a small pre-supernova radius (≲6 × 10 12 cm). The Ba II lines, unusually strong in SN 1987A and some faint II-P events, are almost normal in the case of SN 1998A, indicating that the temperature plays a key role in determining their strength. | |
dc.publisher | Blackwell Publishing Ltd | |
dc.source | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Keywords: Galaxies: Individual: IC 2627; Supernovae: General; Supernovae: Individual: SN 1909A; Supernovae: Individual: SN 1987A; Supernovae: Individual: SN 1998A; Supernovae: Individual: SN 2000cb | |
dc.title | Sn 1998A: explosion of a blue supergiant | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 360 | |
dc.date.issued | 2005 | |
local.identifier.absfor | 020110 - Stellar Astronomy and Planetary Systems | |
local.identifier.ariespublication | MigratedxPub9704 | |
local.type.status | Published Version | |
local.contributor.affiliation | Pastorello, A, INAF-Osservatorio Astronomico di Arcetri | |
local.contributor.affiliation | Baron, E, University of Oklahoma | |
local.contributor.affiliation | Branch, David, University of Oklahoma | |
local.contributor.affiliation | Zampieri, L, INAF-Osservatorio Astronomico di Padova | |
local.contributor.affiliation | Turatto, Massimo, INAF-Osservatorio Astronomico di Padova | |
local.contributor.affiliation | Ramina, M, INAF-Osservatorio Astronomico di Padova | |
local.contributor.affiliation | Benetti, Stefano, INAF-Osservatorio Astronomico di Padova | |
local.contributor.affiliation | Cappellaro, Enrico, INAF Osservatorio Astronomico di Padova, | |
local.contributor.affiliation | Salvo, Maria, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Patat, Ferdinando, European Southern Observatory | |
local.contributor.affiliation | Piemonte, A, European Southern Observatory | |
local.contributor.affiliation | Sollerman, Jesper, Stockholm Observatory | |
local.contributor.affiliation | Leibundgut, Bruno, European Southern Observatory | |
local.contributor.affiliation | Altavilla, G, Universidad de Barcelona | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.startpage | 950 | |
local.bibliographicCitation.lastpage | 962 | |
local.identifier.doi | 10.1111/j.1365-2966.2005.09079.x | |
dc.date.updated | 2015-12-11T10:49:08Z | |
local.identifier.scopusID | 2-s2.0-22144480288 | |
Collections | ANU Research Publications |
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